It is a physical port (opening) in the sub cabinet which increases the output volume, but can reduce the transient response and make the bass sound somewhat muddy or boomy.
It works well if you want maximum volume for rock music or movie sound effects, but not so good if you want accurate music bass sound.
It can be in the form of a tube into the cabinet.
It may be behind the speaker grill.

Ah ... got it
Thanks
Port is really obvious rectangular holes at front of speaker ground level
Should I have bought fully sealed no-port speaker?
Will that give me "punch"
Sorry for dumb questions, but I am willing to learn
I already learnt a lot from this thread
Many thanks

Link to subwoofer is below

Behringer VQ1800D 18'' Active PA Subwoofer at Gear4music

 

Am I stupid? Genius? What?

I put this forgotten mixer in my audio chain and gained a whole lot of tone control over individual music tracks

https://www.gear4music.com/PA-DJ-and-Lighting/SubZero-SZ-MIX08USB-8-Channel-USB-Mixer-Interface/UUA

Easy quick tone adjustment between tracks

Still learning....

 

Port is really obvious rectangular holes at front of speaker ground level
Should I have bought fully sealed no-port speaker?
Will that give me "punch"

A fully sealed sub would give better transient response and thus likely better "punch", but they are not generally as loud at their maximum output.
But you can try plugging the port in your sub to see if it makes a difference.

 

But you can try plugging the port in your sub to see if it makes a difference.

Now that is definitely worth a try!

I will update this post when I have tried it

Many thanks

 

Now that is definitely worth a try!

I will update this post when I have tried it

Many thanks

Problem was not ported vs sealed
Problem was £30 coax to RCA converter introducing noise and killing audio "punch"
Bought £200 Fosi ZD3 DAC and all speaker problems solved
Noise reduced to indetectable and suddenly drums sound great and "punchy"

Lessons learned:
1) Stereo requires two speakers separated in real space, not bullshit ambience claims from a single stereo speaker
2) Source matters - no tech can fix crap input or crap components in the audio chain
3) Balanced is good - makes noise reduction much simpler

Next mission: - find a way to make headphones loud and punchy like speakers
Impossible mission, but will try to get close. I suspect that no headphones in existence will shake the floor with bass
Inputs from forum members who have headphone ideas will still be much appreciated

Many thanks, Hex

 

Problem was not ported vs sealed
Problem was £30 coax to RCA converter.
Bought £200 Fosi ZD3 DAC and all speaker problems solved
Noise reduced to indetectable and suddenly drums sound great and "punchy"

Lessons learned:
1) Stereo requires two speakers separated in real space, not bullshit ambience claims from a single stereo speaker
2) Source matters - no tech can fix crap input or crap components in the audio chain
3) Balanced is good - makes noise reduction much simpler

Next mission: - find a way to make headphones loud and punchy like speakers
Impossible mission, but will try to get close. I suspect that no headphones in existence will shake the floor with bass
Inputs from forum members who have headphone ideas will still be much appreciated

Many thanks, Hex

Lesson 1). It's the room (the physical space and speaker placement) that make for great sound.

 

Don't have the luxury of dedicated room or choice of speaker placement, just Man-cave as I find it
Not looking for great sound, just good sound for my tin ears, which I already achieved to my satisfaction (so far)

Building audiophile listening room is not an option for me

Current issue is good, clear, punchy sound for headphones within approx. £1000 budget.

Appreciate you trying, and replying though
I have learned a lot from this forum already and achieved good results

Can you help with headphone advice please?

 

Don't have the luxury of dedicated room or choice of speaker placement, just Man-cave as I find it
Not looking for great sound, just good sound for my tin ears, which I already achieved to my satisfaction (so far)

Building audiophile listening room is not an option for me

Current issue is good, clear, punchy sound for headphones within approx. £1000 budget.

Appreciate you trying, and replying though
I have learned a lot from this forum already and achieved good results

Can you help with headphone advice please?

You don't need a dedicated room, just one that doesn't make good equipment sound bad. Can't help with headphones.

 

You don't need a dedicated room, just one that doesn't make good equipment sound bad. Can't help with headphones.

Appreciate the reply and the honesty. Thanks

All about headphones now...
... iFi Audio ZEN CAN 3 on order - living hopefully

New request is ... What headphones should I buy, around £200 to £1000, LOUD, Punchy, big bass, balanced/unbalanced don't care
open back, closed, don't care as wife will be downstairs
Above headphone amp claims up to 2W drive.

 

A word of caution, probably way too late, is that too much loud sound, either from speakers or nearby arms firing,(not practice, real conflict) will cause eventual hearing damage that for some reason gets worse long after the exposure ends. The isolation due to damaged hearing is rather bad. So unless the goal is to be isolated, I suggest caution.

 

Thanks MisterBill2

Good advice that may go unheeded....
I am 67 years old and already limited to about 5kHz hearing range. Willing to take a bit of a risk, as loud music is one of my few remaining pleasures

Will take the precaution of filtering out high frequencies, as my understanding is that they can cause hearing loss even though I cannot hear them.